Population Parameters of the Registered Red Sindi in Brazil

[摘要] - The aim of this study was to describe the population structure of the registered Red Sindhi cattle in Brazil. Descriptive statistics of the distribution of the number of progeny are presented, and the generation interval and effective population size were estimated, using pedigree records of animals registered from 1955 to 1998. The observed generation interval for the whole time period was 7.65 yr, and for the period 1994-1998 it was 7.96 yr. The effective population size for the following periods (1979-83, 1984-88, 1989-93 and 1994-98) were, respectively, 501, 26, 20 and 19.

[学科分类] 兽医学

[关键词] population structure;generation interval;effective size;progeny variance     IntroduçãoA raça Sindi é classificada por JOSHI e PHILIPS (1954) como pertencente ao terceiro grupo das raças indianas;onde o principal representante é o gado Gir